1 map; col., 20 x 27 cm.
The Great Northern's route over Stevens Pass was originally laid out with an eye towards the future construction of tunnels that could that could increase efficiency and decrease the hazards of travel. The original line...

1 Map : 26 x 40 cm. "The Main Highways are Shown by the Heavy Black Lines." "Dark green shaded area show Columbia River Basin Project which will reclaim 1,750,000 acres." See front cover and back of map:...

1 map ; negative, 13 x 35 cm.
Before the arrival to Washington State of the first irrigation projects handled by the U.S. Reclamation Service, the Northern Pacific Railroad and other railway companies funded private irrigation projects in the...

1 map: col., 18 x 21 cm.
Before the arrival to Washington State of the first irrigation projects handled by the U.S. Reclamation Service, the Northern Pacific Railroad and other railway companies funded private irrigation projects in the Columbia...